Hinge.



J. OBRIE N. HINGE.

APPLICATION FILED MAR. 18. 1916.

Patented Apr. 25, 1916.

iii-7 3 14 2G /0 9 (13 gqsx E /5 I/zv'enmr':

THE COLUMBIA PLANOGRAPH c0., WASHINGTON, D 6.

JOHN OBRIEN, OF NEW BRITAIN, CONNECTICUT.

HINGE.

Specification of Letters Patent.

Patented Apr. 25, 1915.

Application filed March 18, 1916. Serial No. 85,008.

To all whom it may concern:

Be it known that 1, JOHN OBRIEN, a citizen of the United States, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Hinges, of which the following is a specification.

My invention relates to improvements in hinges, and the object of my improvement is to produce a hinge in which the hinge plate or leaves are formed from suitable sheet material and the securing means for securing the same to the woodwork of a door or casing consists of prongs formed from the said material by punching and bending the said material so as to be integral, and doing this in a special manner, whereby the said prongs will be suitable to hold in a reliable manner, it being understood that the manner of forming the said integral prongs is suitable for use in other devices, such as window catches and house trimmings generally.

In the accompanying drawing :Figure 1 is'a front elevation of a hinge of the style known as a strap hinge embodying my invention. Fig. 2 is a rear elevation of the same. Fig. 3 is a plan view of the same. Fig. 4 is a sectional view on the line 00 m of Fig. 3. Fig. 5 is a plan View of the blank for the left hand leaf shown in Figs. 1 and 2. Fig. 6 is a similar view of part of the blank for the right hand member. Fig. 7 is a plan view, on an enlarged scale, of certain parts shown in Fig. 1 before the tooth is bent downwardly.

The improved strap hinge shown in Fig. 1 is made of sheet material and is composed of a pair of hinge plates or leaves pivotally connected by means of a pivot bolt or pin 10. The said leaves comprise each a body portion 11 having at the inner end a knuckle or knuckles that coijperate with the knuckles on the mating leaf. Thus the left leaf as shown in Fig. 1 is composed of the body portion 11 and a pair of end knuckles 12 and the right leaf is composed of its body portion 11 and an intermediate knuckle 13 that is positioned between the intermediate knuckles 12, all in an ordinary manner. The

two body portions 11 are similar and comprise an elongated piece of sheet material, having tapered lateral edges 14- that con verge from the inner end outwardly, and the prongs 15 are integral with the said body portion. The said prongs 15 are generally V-shaped, formed by suitably slitting the material of the body portion, and they are bent at a right angle to the said body portion, leaving a hole 16 in the body portion 11 that was originally filled by the material forming the said prongs 15.

As shown there are two prongs side by side in the inner end portion 17 of the body portion 11 adjacent the pivotal connection, where the body portion 11 is widest. There is a single prong 15 in the portion 18 of the material immediately outward from the said inner end portion 17, and inward from the middle of the body portion 11, and there is another prong 15 adjacent the extreme outer end 19.

In detail, the prongs 15 comprise the base portion 20, by which the same is connected to the body portion 11 of the leaf, and is generally of \l shape, the tip end 21 being in the form of a sharp point. The said base portion 20 is slightly curved and the material of the prong 15 is correspondingly curved, whereby the prong has an arched form, being convex on the side of the hole 16. Furthermore, the edges of the prongs 15 are serrated, being provided with a plurality of teeth 22.

The curved form of cross-section of the prongs 15 serves to reinforce the same, so that they will be more reliable, and will operate more satisfactorily in being forced in the wood when being placed in position and the serrated edges add to the holding efl'ect when inserted in place.

To further add to the holding qualities of the prongs 15 I may provide a plurality of transverse corrugations, or what I find to be the equivalent of the same, a plurality of lug-like projections 23 on one face that are conveniently formed by indenting the reverse side. Thus there will be formed indentations 24: on one side and the projections 23 on the other side, corresponding to 100 the said indentations 24:, both of which add to the holding qualities when embedded in the Wood of the casing or door.

I claim as my invention A hinge composed of leaves formed of sheet material, the body portion of the said leaves being provided With a plurality of integral prongs, the said prongs being generally of V-shape, having a curved form of cross-section, having serrated edges, and the i0 material of the said prongs being provided with a plurality of lug-like PIOJBCtiOIlS in the form of transverse indentations of the said material.

JOHN OBRIEN. Witnesses:

JAMEs T. MESKJLL, MARY FITZPATRICK.

copies of this patent may be obtained for five cents each, by addressing the "Commissioner of rateltl, Washington, D. 0. 

